Added expires at column to response set
Added utility methods to survey and unit tests
Updated parse code to schedule affected response sets as expired
Updated survey to only update previous response sets
Created migration to set expiry on existing response sets
Added utility methods for checking if a certificate has expired
Added warnings when a certificate is expired or will expire soon
automatically updated dependencies
Merge pull request #649 from theodi/update-dependencies-2013-10-30

automatically updated dependencies
Ignored all ds store files
Modified migrations to add field to certificate instead
Moved certificate expiry logic to certificate class method
Updated helper methods
Updated tests
Bumped schema timestamp to try to make Jenkins update the database
updated ffi gem
Merge pull request #651 from theodi/ffi

updated ffi gem
Merge pull request #648 from theodi/certificate-expiry-reporting

Certificate expiry reporting
stop homepage globe cycling on focus
Merge pull request #654 from theodi/globe-issue

Homepage globe cycle issue